diff --git a/Examples/UIExplorer/UIExplorerUnitTests/RCTConvert_YGValueTests.m b/Examples/UIExplorer/UIExplorerUnitTests/RCTConvert_YGValueTests.m
index 3b6f64f583f..299dc5b1698 100644
--- a/Examples/UIExplorer/UIExplorerUnitTests/RCTConvert_YGValueTests.m
+++ b/Examples/UIExplorer/UIExplorerUnitTests/RCTConvert_YGValueTests.m
@@ -15,7 +15,6 @@
 #import <XCTest/XCTest.h>
 
 #import <React/RCTConvert.h>
-#import <React/RCTUtils.h>
 
 @interface RCTConvert_YGValueTests : XCTestCase
 
diff --git a/Examples/UIExplorer/UIExplorerUnitTests/RCTJSCExecutorTests.m b/Examples/UIExplorer/UIExplorerUnitTests/RCTJSCExecutorTests.m
index a7418e53c8b..92118c3f6c7 100644
--- a/Examples/UIExplorer/UIExplorerUnitTests/RCTJSCExecutorTests.m
+++ b/Examples/UIExplorer/UIExplorerUnitTests/RCTJSCExecutorTests.m
@@ -17,7 +17,6 @@
 #import <XCTest/XCTest.h>
 
 #import <React/RCTJSCExecutor.h>
-#import <React/RCTUtils.h>
 
 @interface RCTJSCExecutorTests : XCTestCase
 
diff --git a/Examples/UIExplorer/UIExplorerUnitTests/RCTModuleInitNotificationRaceTests.m b/Examples/UIExplorer/UIExplorerUnitTests/RCTModuleInitNotificationRaceTests.m
index 126b466df56..1278650765d 100644
--- a/Examples/UIExplorer/UIExplorerUnitTests/RCTModuleInitNotificationRaceTests.m
+++ b/Examples/UIExplorer/UIExplorerUnitTests/RCTModuleInitNotificationRaceTests.m
@@ -20,7 +20,6 @@
 #import <React/RCTBridgeModule.h>
 #import <React/RCTJavaScriptExecutor.h>
 #import <React/RCTUIManager.h>
-#import <React/RCTUtils.h>
 #import <React/RCTViewManager.h>
 
 #define RUN_RUNLOOP_WHILE(CONDITION) \
diff --git a/Examples/UIExplorer/UIExplorerUnitTests/RCTMultipartStreamReaderTests.m b/Examples/UIExplorer/UIExplorerUnitTests/RCTMultipartStreamReaderTests.m
index a3c96c084d1..6b8297a8070 100644
--- a/Examples/UIExplorer/UIExplorerUnitTests/RCTMultipartStreamReaderTests.m
+++ b/Examples/UIExplorer/UIExplorerUnitTests/RCTMultipartStreamReaderTests.m
@@ -15,7 +15,6 @@
 #import <XCTest/XCTest.h>
 
 #import <React/RCTMultipartStreamReader.h>
-#import <React/RCTUtils.h>
 
 @interface RCTMultipartStreamReaderTests : XCTestCase
 
diff --git a/Libraries/CameraRoll/RCTImagePickerManager.m b/Libraries/CameraRoll/RCTImagePickerManager.m
index 0e30307f87f..e851b5fca4d 100644
--- a/Libraries/CameraRoll/RCTImagePickerManager.m
+++ b/Libraries/CameraRoll/RCTImagePickerManager.m
@@ -15,7 +15,6 @@
 
 #import <React/RCTConvert.h>
 #import <React/RCTImageStoreManager.h>
-#import <React/RCTLog.h>
 #import <React/RCTRootView.h>
 #import <React/RCTUtils.h>
 
diff --git a/Libraries/Image/RCTGIFImageDecoder.m b/Libraries/Image/RCTGIFImageDecoder.m
index dc3beb70273..e9777bec16a 100644
--- a/Libraries/Image/RCTGIFImageDecoder.m
+++ b/Libraries/Image/RCTGIFImageDecoder.m
@@ -10,7 +10,6 @@
 #import "RCTGIFImageDecoder.h"
 
 #import <ImageIO/ImageIO.h>
-#import <MobileCoreServices/MobileCoreServices.h>
 #import <QuartzCore/QuartzCore.h>
 
 #import <React/RCTUtils.h>
diff --git a/Libraries/Image/RCTImageCache.m b/Libraries/Image/RCTImageCache.m
index 43d5aeafeb7..267edd2da1c 100644
--- a/Libraries/Image/RCTImageCache.m
+++ b/Libraries/Image/RCTImageCache.m
@@ -9,7 +9,6 @@
 
 #import "RCTImageCache.h"
 
-#import <libkern/OSAtomic.h>
 #import <objc/runtime.h>
 
 #import <ImageIO/ImageIO.h>
diff --git a/Libraries/Image/RCTImageViewManager.m b/Libraries/Image/RCTImageViewManager.m
index 2d044fb0387..3b1035f9660 100644
--- a/Libraries/Image/RCTImageViewManager.m
+++ b/Libraries/Image/RCTImageViewManager.m
@@ -12,7 +12,6 @@
 #import <UIKit/UIKit.h>
 
 #import <React/RCTConvert.h>
-#import <React/RCTImageSource.h>
 
 #import "RCTImageLoader.h"
 #import "RCTImageView.h"
diff --git a/Libraries/NativeAnimation/Drivers/RCTSpringAnimation.m b/Libraries/NativeAnimation/Drivers/RCTSpringAnimation.m
index e0bb3363a34..c9709d48e56 100644
--- a/Libraries/NativeAnimation/Drivers/RCTSpringAnimation.m
+++ b/Libraries/NativeAnimation/Drivers/RCTSpringAnimation.m
@@ -14,7 +14,6 @@
 #import <React/RCTConvert.h>
 #import <React/RCTDefines.h>
 
-#import "RCTAnimationUtils.h"
 #import "RCTValueAnimatedNode.h"
 
 @interface RCTSpringAnimation ()
diff --git a/React/Modules/RCTClipboard.m b/React/Modules/RCTClipboard.m
index 8d059c4a374..8115f5e522c 100644
--- a/React/Modules/RCTClipboard.m
+++ b/React/Modules/RCTClipboard.m
@@ -9,8 +9,6 @@
 
 #import "RCTClipboard.h"
 
-#import "RCTUtils.h"
-
 #import <UIKit/UIKit.h>
 
 @implementation RCTClipboard
diff --git a/React/Views/RCTSlider.m b/React/Views/RCTSlider.m
index 4032794eb19..358d443fbb8 100644
--- a/React/Views/RCTSlider.m
+++ b/React/Views/RCTSlider.m
@@ -9,8 +9,6 @@
 
 #import "RCTSlider.h"
 
-#import <tgmath.h>
-
 @implementation RCTSlider
 {
   float _unclippedValue;
diff --git a/ReactCommon/cxxreact/JSBigString.cpp b/ReactCommon/cxxreact/JSBigString.cpp
index 69ed3a46116..2bd44480040 100644
--- a/ReactCommon/cxxreact/JSBigString.cpp
+++ b/ReactCommon/cxxreact/JSBigString.cpp
@@ -3,7 +3,6 @@
 #include "JSBigString.h"
 
 #include <fcntl.h>
-#include <stdio.h>
 #include <sys/stat.h>
 
 #include <folly/Memory.h>
diff --git a/ReactCommon/cxxreact/tests/jsarg_helpers.cpp b/ReactCommon/cxxreact/tests/jsarg_helpers.cpp
index 0a2268a6a9a..8f246bc1ec5 100644
--- a/ReactCommon/cxxreact/tests/jsarg_helpers.cpp
+++ b/ReactCommon/cxxreact/tests/jsarg_helpers.cpp
@@ -6,7 +6,6 @@
 
 #include <gtest/gtest.h>
 #include <algorithm>
-#include <vector>
 
 using namespace std;
 using namespace folly;
diff --git a/ReactCommon/cxxreact/tests/jsbigstring.cpp b/ReactCommon/cxxreact/tests/jsbigstring.cpp
index 75f9a9cda22..eaa91a9467b 100644
--- a/ReactCommon/cxxreact/tests/jsbigstring.cpp
+++ b/ReactCommon/cxxreact/tests/jsbigstring.cpp
@@ -1,4 +1,3 @@
-
 // Copyright 2004-present Facebook. All Rights Reserved.
 #include <sys/mman.h>
 #include <fcntl.h>
@@ -6,7 +5,6 @@
 #include <folly/File.h>
 #include <gtest/gtest.h>
 #include <cxxreact/Executor.h>
-#include <cxxreact/MessageQueueThread.h>
 #include <cxxreact/MethodCall.h>
 
 using namespace facebook;