Cleanup std includes

Remove `deque` from files it isn't actually used in. Add it and `stack`
to files that it is - presumably they were previously transitively found
through other includes.

Author: bnbarham

Diff for: lib/AST/NameLookup.cpp

@@ -49,6 +49,8 @@
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/raw_ostream.h"
 
+#include <deque>
+
 #define DEBUG_TYPE "namelookup"
 
 using namespace swift;

Diff for: lib/AST/RequirementMachine/KnuthBendix.cpp

@@ -34,7 +34,6 @@
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/raw_ostream.h"
 #include <algorithm>
-#include <deque>
 #include <vector>
 
 #include "RewriteContext.h"

Diff for: lib/DependencyScan/ScanDependencies.cpp

@@ -65,6 +65,7 @@
 #include <algorithm>
 #include <set>
 #include <sstream>
+#include <stack>
 #include <string>
 #include <algorithm>
 

Diff for: lib/IDE/ImportDepth.cpp

@@ -15,6 +15,8 @@
 #include "swift/Basic/Assertions.h"
 #include "clang/Basic/Module.h"
 
+#include <deque>
+
 using namespace swift;
 using namespace swift::ide;
 

Diff for: lib/SILOptimizer/Utils/CastOptimizer.cpp

@@ -42,7 +42,6 @@
 #include "llvm/IR/Intrinsics.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Compiler.h"
-#include <deque>
 #include <optional>
 
 using namespace swift;

Diff for: lib/SILOptimizer/Utils/InstOptUtils.cpp

@@ -45,7 +45,6 @@
 #include "llvm/IR/Intrinsics.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Compiler.h"
-#include <deque>
 #include <optional>
 
 using namespace swift;

Diff for: tools/SourceKit/lib/SwiftLang/CodeCompletionOrganizer.cpp

@@ -23,7 +23,6 @@
 #include "llvm/ADT/DenseSet.h"
 #include "llvm/ADT/ilist.h"
 #include "llvm/ADT/ilist_node.h"
-#include <deque>
 
 using namespace SourceKit;
 using namespace CodeCompletion;