Don't have to differentiate cmdline and tsconfig.json description

This reverts commit efe57733ca and 94f9e67a24.

src/compiler/commandLineParser.ts

@@ -151,8 +151,7 @@ namespace ts {
             },
             showInSimplifiedHelpView: true,
             category: Diagnostics.Basic_Options,
-            description: Diagnostics.Specify_library_files_to_be_included_in_the_compilation_Colon,
-            descriptionOnTSConfig: Diagnostics.Specify_library_files_to_be_included_in_the_compilation
+            description: Diagnostics.Specify_library_files_to_be_included_in_the_compilation_Colon
         },
         {
             name: "allowJs",
@@ -1352,8 +1351,7 @@ namespace ts {
                         optionName = `// "${option.name}": ${JSON.stringify(getDefaultValueForOption(option))},`;
                     }
                     nameColumn.push(optionName);
-                    const optionDescription = option.descriptionOnTSConfig || option.description;
-                    descriptionColumn.push(`/* ${optionDescription && getLocaleSpecificMessage(optionDescription) || option.name} */`);
+                    descriptionColumn.push(`/* ${option.description && getLocaleSpecificMessage(option.description) || option.name} */`);
                     marginLength = Math.max(optionName.length, marginLength);
                 }
             });

src/compiler/diagnosticMessages.json

@@ -3451,10 +3451,6 @@
         "category": "Error",
         "code": 6189
     },
-    "Specify library files to be included in the compilation.": {
-        "category": "Message",
-        "code": 6190
-    },
     "Variable '{0}' implicitly has an '{1}' type.": {
         "category": "Error",
         "code": 7005

src/compiler/types.ts

@@ -4120,7 +4120,6 @@ namespace ts {
         isFilePath?: boolean;                                   // True if option value is a path or fileName
         shortName?: string;                                     // A short mnemonic for convenience - for instance, 'h' can be used in place of 'help'
         description?: DiagnosticMessage;                        // The message describing what the command line switch does
-        descriptionOnTSConfig?: DiagnosticMessage;              // The message describing what the option does in tsconfig.json file
         paramType?: DiagnosticMessage;                          // The name to be used for a non-boolean option's parameter
         isTSConfigOnly?: boolean;                               // True if option can only be specified via tsconfig.json file
         isCommandLineOnly?: boolean;