Minor adaption ti filesystem include and removed arcsect submodule to make it work on my local machine

.gitmodules

@@ -13,9 +13,6 @@
 [submodule "generators/fsfwgen"]
 	path = generators/fsfwgen
 	url = https://egit.irs.uni-stuttgart.de/fsfw/fsfw-gen.git
-[submodule "thirdparty/arcsec_star_tracker"]
-	path = thirdparty/arcsec_star_tracker
-	url = https://egit.irs.uni-stuttgart.de/eive/arcsec_star_tracker.git
 [submodule "thirdparty/json"]
 	path = thirdparty/json
 	url = https://github.com/nlohmann/json.git

mission/devices/devicedefinitions/payloadPcduDefinitions.h

@@ -5,7 +5,7 @@
 #include <fsfw/devicehandlers/DeviceHandlerIF.h>
 
 #include <cstddef>
-#include <filesystem>
+#include <experimental/filesystem>
 #include <nlohmann/json.hpp>
 
 #include "OBSWConfig.h"

mission/memory/NVMParameterBase.cpp

@@ -8,7 +8,7 @@
 NVMParameterBase::NVMParameterBase(std::string fullName) : fullName(fullName) {}
 
 ReturnValue_t NVMParameterBase::readJsonFile() {
-  if (std::filesystem::exists(fullName)) {
+  if (std::experimental::filesystem::exists(fullName)) {
     // Read JSON file content into object
     std::ifstream i(fullName);
     try {
@@ -37,7 +37,7 @@ void NVMParameterBase::setFullName(std::string fullName) { this->fullName = full
 
 std::string NVMParameterBase::getFullName() const { return fullName; }
 
-bool NVMParameterBase::getJsonFileExists() { return std::filesystem::exists(fullName); }
+bool NVMParameterBase::getJsonFileExists() { return std::experimental::filesystem::exists(fullName); }
 
 void NVMParameterBase::printKeys() const {
   sif::info << "Printing keys for JSON file " << fullName << std::endl;

mission/memory/NVMParameterBase.h

@@ -1,7 +1,7 @@
 #ifndef BSP_Q7S_CORE_NVMPARAMS_NVMPARAMIF_H_
 #define BSP_Q7S_CORE_NVMPARAMS_NVMPARAMIF_H_
 
-#include <filesystem>
+#include <experimental/filesystem>
 #include <nlohmann/json.hpp>
 #include <string>
 

thirdparty/arcsec_star_tracker

@@ -1 +0,0 @@
-Subproject commit 93e93965e2c6405170b62c523dea1990db02d2ad