Revert "[coroutines] Support "coroutines" feature in module map requires clause"

This reverts commit r304054.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@304057 91177308-0d34-0410-b5e6-96231b3b80d8

Author: EricWF

docs/Modules.rst

@@ -413,9 +413,6 @@ altivec
 blocks
   The "blocks" language feature is available.
 
-coroutines
-  Support for the coroutines TS is available.
-
 cplusplus
   C++ support is available.
 

lib/Basic/Module.cpp

@@ -64,7 +64,6 @@ static bool hasFeature(StringRef Feature, const LangOptions &LangOpts,
   bool HasFeature = llvm::StringSwitch<bool>(Feature)
                         .Case("altivec", LangOpts.AltiVec)
                         .Case("blocks", LangOpts.Blocks)
-                        .Case("coroutines", LangOpts.CoroutinesTS)
                         .Case("cplusplus", LangOpts.CPlusPlus)
                         .Case("cplusplus11", LangOpts.CPlusPlus11)
                         .Case("freestanding", LangOpts.Freestanding)

test/Modules/Inputs/DependsOnModule.framework/Headers/coroutines.h

@@ -22,14 +22,7 @@ framework module DependsOnModule {
   explicit module CustomReq2 {
     requires custom_req2
   }
-  explicit module Coroutines {
-    requires coroutines
-    header "coroutines.h"
-  }
-  explicit module NotCoroutines {
-    requires !coroutines
-    header "not_coroutines.h"
-  }
+
   explicit framework module SubFramework {
     umbrella header "SubFramework.h"