Fix -Werror flags, build fails with them

--- a/CMakeScripts/DefineDependsandFlags.cmake
+++ b/CMakeScripts/DefineDependsandFlags.cmake
@@ -32,8 +32,6 @@
 
 # Errors for common mistakes
 list(APPEND INKSCAPE_CXX_FLAGS "-fstack-protector-strong")
-list(APPEND INKSCAPE_CXX_FLAGS "-Werror=format")                # e.g.: printf("%s", std::string("foo"))
-list(APPEND INKSCAPE_CXX_FLAGS "-Werror=format-security")       # e.g.: printf(variable);
 list(APPEND INKSCAPE_CXX_FLAGS "-Wno-switch")                   # See !849 for discussion
 list(APPEND INKSCAPE_CXX_FLAGS_DEBUG "-Og")                     # -Og for _FORTIFY_SOURCE. One could add -Weffc++ here to see approx. 6000 warnings
 list(APPEND INKSCAPE_CXX_FLAGS_DEBUG "-Wcomment")