Git: Remove unused default value

Change-Id: I2e9354cc675281a5025706d023e92d43c81910f6
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/git/commitdata.cpp

@@ -175,7 +175,7 @@ QStringList CommitData::filterFiles(const CommitData::FileState &state) const
 {
     QStringList result;
     foreach (const StateFilePair &p, files) {
-        if (state == AllStates || state == p.first)
+        if (state == p.first)
             result.append(p.second);
     }
     return result;

src/plugins/git/commitdata.h

@@ -99,7 +99,7 @@ public:
 
     // Convenience to retrieve the file names from
     // the specification list. Optionally filter for a certain state
-    QStringList filterFiles(const FileState &state = AllStates) const;
+    QStringList filterFiles(const FileState &state) const;
 
     static QString stateDisplayName(const FileState &state);