Refactoring: Cleanup include that checkheaders reported as not needed

lib/errorlogger.h

@@ -23,7 +23,7 @@
 #include <ctime>
 #include <list>
 #include <string>
-#include "settings.h"
+
 class Token;
 class Tokenizer;
 

lib/preprocessor.cpp

@@ -23,6 +23,7 @@
 #include "filelister.h"
 #include "path.h"
 #include "errorlogger.h"
+#include "settings.h"
 
 #include <algorithm>
 #include <stdexcept>

test/testpreprocessor.cpp

@@ -25,6 +25,8 @@
 #include "preprocessor.h"
 #include "tokenize.h"
 #include "token.h"
+#include "settings.h"
+
 #include <map>
 #include <string>
 #include <sstream>

test/testsimplifytokens.cpp

@@ -21,6 +21,8 @@
 #include "testsuite.h"
 #include "tokenize.h"
 #include "token.h"
+#include "settings.h"
+
 #include <sstream>
 
 extern std::ostringstream errout;

test/testtokenize.cpp

@@ -21,11 +21,12 @@
 // the code for a known configuration, it generates the code for each configuration.
 
 
-#include <cstring>
 #include "testsuite.h"
 #include "tokenize.h"
 #include "token.h"
 #include "classinfo.h"
+#include "settings.h"
+#include <cstring>
 
 extern std::ostringstream errout;
 class TestTokenizer : public TestFixture