[Concurrency] Move removal of leading "get" for async imports.

Name adjustments should be performed by omitNeedlessWords(), not the
early classifcation of async imports.

lib/Basic/StringExtras.cpp

@@ -1220,6 +1220,7 @@ bool swift::omitNeedlessWords(StringRef &baseName,
                               bool returnsSelf,
                               bool isProperty,
                               const InheritedNameSet *allPropertyNames,
+                              bool isAsync,
                               StringScratchSpace &scratch) {
   bool anyChanges = false;
   OmissionTypeName resultType = returnsSelf ? contextType : givenResultType;
@@ -1287,6 +1288,14 @@ bool swift::omitNeedlessWords(StringRef &baseName,
     }
   }
 
+  // If the base name of a method imported as "async" starts with the word
+  // "get", drop the "get".
+  if (isAsync && camel_case::getFirstWord(baseName) == "get" &&
+      baseName.size() > 3) {
+    baseName = baseName.substr(3);
+    anyChanges = true;
+  }
+
   // If needed, split the base name.
   if (!argNames.empty() &&
       splitBaseName(baseName, argNames[0], paramTypes[0], firstParamName))