Remove redundant warning flag (missing-braces) for missing braces

Author: smuzaffar

scram-tools.file/tools/gcc/gcc-cxxcompiler.xml

@@ -19,7 +19,7 @@
     <flags CXXFLAGS="-Wextra -Wpessimizing-move -Wclass-memaccess"/>
     <flags CXXFLAGS="-Wno-cast-function-type -Wno-unused-but-set-parameter -Wno-ignored-qualifiers -Wno-unused-parameter"/>
     <flags CXXFLAGS="-Wunused -Wparentheses -Werror=return-type"/>
-    <flags CXXFLAGS="-Werror=missing-braces -Werror=unused-value"/>
+    <flags CXXFLAGS="-Werror=unused-value"/>
     <flags CXXFLAGS="-Werror=unused-label"/>
     <flags CXXFLAGS="-Werror=address -Werror=format -Werror=sign-compare"/>
     <flags CXXFLAGS="-Werror=write-strings -Werror=delete-non-virtual-dtor"/>