Remove "-Werror" for regular builds, keep in CI

CMakeLists.txt

@@ -84,7 +84,7 @@ INCLUDE("cmake/corryvreckan.cmake")
 #########################################
 
 # Set standard build flags
-SET(COMPILER_FLAGS -pedantic -Wall -Wextra -Wcast-align -Wcast-qual -Wconversion -Wuseless-cast -Wctor-dtor-privacy -Wzero-as-null-pointer-constant -Wdisabled-optimization -Wformat=2 -Winit-self -Wlogical-op -Wmissing-declarations -Wmissing-include-dirs -Wnoexcept -Wold-style-cast -Woverloaded-virtual -Wredundant-decls -Wsign-conversion -Wsign-promo -Wstrict-null-sentinel -Wswitch-default -Wundef -Werror -Wshadow -Wformat-security -Wdeprecated -fdiagnostics-color=auto -Wheader-hygiene)
+SET(COMPILER_FLAGS -pedantic -Wall -Wextra -Wcast-align -Wcast-qual -Wconversion -Wuseless-cast -Wctor-dtor-privacy -Wzero-as-null-pointer-constant -Wdisabled-optimization -Wformat=2 -Winit-self -Wlogical-op -Wmissing-declarations -Wmissing-include-dirs -Wnoexcept -Wold-style-cast -Woverloaded-virtual -Wredundant-decls -Wsign-conversion -Wsign-promo -Wstrict-null-sentinel -Wswitch-default -Wundef -Wshadow -Wformat-security -Wdeprecated -fdiagnostics-color=auto -Wheader-hygiene)
 
 INCLUDE("cmake/compiler-flag-checks.cmake")