pio: config: removed a "default" option

i already have c++20, so it is already ON

config/common.ini

@@ -61,11 +61,6 @@ code_quality_build_flags =
     ; it is OK for my code, shitload of warnings for included libs
 ;    -Woverloaded-virtual
 
-    ; Warn about deprecated uses of the volatile qualifier. Enabled by default with -std=c++20.
-    ; https://gcc.gnu.org/onlinedocs/gcc/C_002b_002b-Dialect-Options.html
-    ; it is OK for my code, shitload of warnings for included libs
-;    -Wvolatile
-
     ; Warn about overriding virtual functions that are not marked with the override keyword.
     ; https://gcc.gnu.org/onlinedocs/gcc/C_002b_002b-Dialect-Options.html
     ; it is OK for my code, shitload of warnings for included libs