Remove StaticLibraries job of RNTester as they are duplicated

Summary:
Removing the `test_ios_rntester` jobs for the following config:
- (OldArch, JSC, StaticLibraries)
- (OldArch, Hermes, StaticLibraries)

As this job just test that this configuration can be built and we have two other jobs (`test_ios-Hermes` and `test_ios-JSC`) which builds the same configs (so the test is duplicated) and they run unit and integration tests on top of these.

bypass-github-export-checks

## Changelog:
[Internal] - Remove duplicated `test_ios_rntester` jobs

Reviewed By: cortinico

Differential Revision: D48264664

fbshipit-source-id: 6dbf0edb9aba9ca8340b7c722b4f5c189c961577

.circleci/config.yml

@@ -2170,6 +2170,15 @@ workflows:
               architecture: ["NewArch", "OldArch"]
               jsengine: ["Hermes", "JSC"]
               use_frameworks: ["StaticLibraries", "DynamicFrameworks"]
+            exclude:
+              # Tested by test_ios-Hermes
+              - architecture: "OldArch"
+                jsengine: "Hermes"
+                use_frameworks: "StaticLibraries"
+              # Tested by test_ios-JSC
+              - architecture: "OldArch"
+                jsengine: "JSC"
+                use_frameworks: "StaticLibraries"
       - test_ios:
           name: "Test iOS with Ruby 3.2.0"
           run_unit_tests: true