Removal of appending mobile specific flags to TV

Removal of appending mobile specific flags to TV

command line flags specific to mobile like "use-mobile-user-agent" and
"use-mobile-viewport-style" are appended by default when we run ubrowser
on mobile and TV and also this results in duplication as these flags are
already present in command_line_efl.cc which is common to all apps like
mini_browser, efl_webview_app and ubrowser.

M42 patch: http://165.213.202.130/gerrit/#/c/84358/

Bug: http://web.sec.samsung.net/bugzilla/show_bug.cgi?id=14816

Reviewed by: a1.gomes, sns.park

Change-Id: I916e4f270c182087e18d6bb022a7727d0e8e9590
Signed-off-by: uzair.jaleel <uzair.jaleel@samsung.com>