Stop exporting -no_fps_capping to the launcher.

Given the number of unintended consequences that can result from use of this command-line flag, we should return to the pre-137eb7e4d4cb0f9c153d15bbcce847347aa3d716 behavior of not including it in the exe_params[] array; anyone who knows what it does and why we don't advertise it can still use it for testing purposes, but it should prevent the typical user from turning it on without knowing exactly what can go wrong.

Author: MageKing17

code/cmdline/cmdline.cpp

@@ -148,7 +148,6 @@ Flag exe_params[] =
 	{ "-enable_shadows",	"Enable Shadows",							true,	EASY_MEM_ALL_ON,	EASY_DEFAULT,		"Graphics",		"http://www.hard-light.net/wiki/index.php/Command-Line_Reference#-no_shadows"},
 	{ "-img2dds",			"Compress non-compressed images",			true,	0,					EASY_DEFAULT,		"Game Speed",	"http://www.hard-light.net/wiki/index.php/Command-Line_Reference#-img2dds", },
 	{ "-no_vsync",			"Disable vertical sync",					true,	0,					EASY_DEFAULT,		"Game Speed",	"http://www.hard-light.net/wiki/index.php/Command-Line_Reference#-no_vsync", },
-	{ "-no_fps_capping",	"Don't limit frames-per-second",			true,	0,					EASY_DEFAULT,		"Game Speed",	"http://www.hard-light.net/wiki/index.php/Command-Line_Reference#-no_fps_capping", },
 	{ "-cache_bitmaps",		"Cache bitmaps between missions",			true,	0,					EASY_DEFAULT_MEM,	"Game Speed",	"http://www.hard-light.net/wiki/index.php/Command-Line_Reference#-cache_bitmaps", },
 
 	{ "-dualscanlines",		"Add another pair of scanning lines",		true,	0,					EASY_DEFAULT,		"HUD",			"http://www.hard-light.net/wiki/index.php/Command-Line_Reference#-dualscanlines", },