[Dependency Scanning] Do not disambiguate 'GlobalModuleDependenciesCache' by search path set

This is no longer necessary since the cache is always configured for the current scanning context hash, which includes the search path set.

lib/Serialization/ModuleDependencyScanner.cpp

@@ -167,20 +167,16 @@ Optional<ModuleDependencies> SerializedModuleLoaderBase::getModuleDependencies(
 
   // Check whether we've cached this result.
   if (auto found = cache.findDependencies(
-           moduleName,
-           {ModuleDependenciesKind::SwiftInterface, currentSearchPathSet}))
+           moduleName, ModuleDependenciesKind::SwiftInterface))
     return found;
   if (auto found = cache.findDependencies(
-           moduleName,
-           {ModuleDependenciesKind::SwiftSource, currentSearchPathSet}))
+           moduleName, ModuleDependenciesKind::SwiftSource))
     return found;
   if (auto found = cache.findDependencies(
-            moduleName,
-            {ModuleDependenciesKind::SwiftBinary, currentSearchPathSet}))
+            moduleName, ModuleDependenciesKind::SwiftBinary))
     return found;
   if (auto found = cache.findDependencies(
-            moduleName,
-            {ModuleDependenciesKind::SwiftPlaceholder, currentSearchPathSet}))
+            moduleName, ModuleDependenciesKind::SwiftPlaceholder))
     return found;
 
   ImportPath::Module::Builder builder(Ctx, moduleName, /*separator=*/'.');