Clang: Remove left-over functions

...that helped modifying the delayed parse timeout. Those are pointless
now (at least in the backend) because we have a non-blocking translation
unit (except for the first edit) around.

The only client using the timer value is currently
ClangCodeModelServer::registerUnsavedFilesForEditor - a case for which
no configuration should be needed.

Change-Id: I0f4171d6ee98bcac229aa5a207b6aa17b336a29a
Reviewed-by: David Schulz <david.schulz@qt.io>

src/tools/clangbackend/ipcsource/clangcodemodelserver.cpp

@@ -55,34 +55,9 @@
 
 namespace ClangBackEnd {
 
-namespace {
-
-int getIntervalFromEnviromentVariable()
-{
-    bool isConversionOk = false;
-    const int intervalAsInt = qEnvironmentVariableIntValue("QTC_CLANG_DELAYED_REPARSE_TIMEOUT",
-                                                           &isConversionOk);
-
-    if (isConversionOk)
-        return intervalAsInt;
-    else
-        return -1;
-}
-
-int delayedDocumentAnnotationsTimerInterval()
-{
-    static const int defaultInterval = 1500;
-    static const int userDefinedInterval = getIntervalFromEnviromentVariable();
-    static const int interval = userDefinedInterval >= 0 ? userDefinedInterval : defaultInterval;
-
-    return interval;
-}
-
-} // anonymous
-
 ClangCodeModelServer::ClangCodeModelServer()
     : documents(projects, unsavedFiles)
-    , updateDocumentAnnotationsTimeOutInMs(delayedDocumentAnnotationsTimerInterval())
+    , updateDocumentAnnotationsTimeOutInMs(1500)
 {
     updateDocumentAnnotationsTimer.setSingleShot(true);