Feature/cleanup (#837)

* Style guide fixes
* Various cleanups
* Update SGCT

modules/spacecraftinstruments/util/sequenceparser.cpp

@@ -26,15 +26,9 @@
 
 #include <openspace/engine/globals.h>
 #include <openspace/util/spicemanager.h>
-
 #include <ghoul/logging/logmanager.h>
-
 #include <cstring>
 
-namespace {
-    constexpr const char* _loggerCat = "SequenceParser";
-} // namespace
-
 namespace openspace {
 
 std::map<std::string, ImageSubset>& SequenceParser::getSubsetMap() {