Remove GLSLANG_WEB and GLSLANG_WEB_DEVEL

This CL removes the GLSLANG_WEB and GLSLANG_WEB_DEVEL
cmake build options and their usage in the codebase.

Issue #2958

glslang/Public/ShaderLang.h

@@ -728,8 +728,6 @@ private:
     TShader& operator=(TShader&);
 };
 
-#if !defined(GLSLANG_WEB)
-
 //
 // A reflection database and its interface, consistent with the OpenGL API reflection queries.
 //
@@ -846,8 +844,6 @@ public:
     virtual void addStage(EShLanguage stage, TIntermediate& stageIntermediate) = 0;
 };
 
-#endif // !GLSLANG_WEB
-
 // Make one TProgram per set of shaders that will get linked together.  Add all
 // the shaders that are to be linked together.  After calling shader.parse()
 // for all shaders, call link().
@@ -867,8 +863,6 @@ public:
 
     TIntermediate* getIntermediate(EShLanguage stage) const { return intermediate[stage]; }
 
-#if !defined(GLSLANG_WEB)
-
     // Reflection Interface
 
     // call first, to do liveness analysis, index mapping, etc.; returns false on failure
@@ -961,7 +955,6 @@ public:
     // If resolver is not provided it uses the previous approach
     // and respects auto assignment and offsets.
     GLSLANG_EXPORT bool mapIO(TIoMapResolver* pResolver = nullptr, TIoMapper* pIoMapper = nullptr);
-#endif // !GLSLANG_WEB
 
 protected:
     GLSLANG_EXPORT bool linkStage(EShLanguage, EShMessages);
@@ -972,9 +965,7 @@ protected:
     TIntermediate* intermediate[EShLangCount];
     bool newedIntermediate[EShLangCount];      // track which intermediate were "new" versus reusing a singleton unit in a stage
     TInfoSink* infoSink;
-#if !defined(GLSLANG_WEB)
     TReflection* reflection;
-#endif
     bool linked;
 
 private: