Removed trailing spaces in the most relevant files

Command used for the job:
egrep -rl ' $' --include *.c --include *.h --include  *.s --include  *.inc --include  *.txt *  | xargs sed -i 's/\s\+$//g'

Credits to Grant Murphy from Stack Overflow.

include/constants/weather.h

@@ -16,7 +16,7 @@
 #define WEATHER_DROUGHT                 12
 #define WEATHER_DOWNPOUR                13
 #define WEATHER_UNDERWATER_BUBBLES      14
-#define WEATHER_ABNORMAL                15  // The alternating weather during Groudon/Kyogre conflict 
+#define WEATHER_ABNORMAL                15  // The alternating weather during Groudon/Kyogre conflict
 #define WEATHER_ROUTE119_CYCLE          20
 #define WEATHER_ROUTE123_CYCLE          21