[ADAPTER] Remove extra mapping on Stadia #422

Job	Run time
build (hw1, 3do)	2m 43s
build (hw1, cdi)	2m 38s
build (hw1, dreamcast)	2m 42s
build (hw1, gamecube)	2m 39s
build (hw1, gbahd)	2m 38s
build (hw1, genesis)	2m 41s
build (hw1, jaguar)	2m 48s
build (hw1, jvs_arcade)	2m 36s
build (hw1, n64)	2m 39s
build (hw1, nes)	2m 34s
build (hw1, parallel_1p)	2m 37s
build (hw1, parallel_1p_3v3)	2m 37s
build (hw1, parallel_2p)	2m 38s
build (hw1, parallel_2p_3v3)	2m 36s
build (hw1, pc_engine)	2m 43s
build (hw1, pcfx)	2m 43s
build (hw1, playstation)	2m 37s
build (hw1, saturn)	2m 37s
build (hw1, snes)	2m 34s
build (hw1, universal)	2m 35s
build (hw1, virtualboy)	2m 37s
build (hw1, wii_extension)	2m 41s
build (hw2, 3do)	2m 38s
build (hw2, cdi)	2m 40s
build (hw2, dreamcast)	2m 36s
build (hw2, gamecube)	2m 37s
build (hw2, gbahd)	2m 43s
build (hw2, genesis)	2m 38s
build (hw2, jaguar)	2m 39s
build (hw2, jvs_arcade)	2m 35s
build (hw2, n64)	2m 44s
build (hw2, nes)	2m 35s
build (hw2, parallel_1p)	2m 41s
build (hw2, parallel_1p_3v3)	2m 39s
build (hw2, parallel_2p)	2m 42s
build (hw2, parallel_2p_3v3)	2m 43s
build (hw2, pc_engine)	2m 37s
build (hw2, pcfx)	2m 38s
build (hw2, playstation)	2m 39s
build (hw2, saturn)	2m 38s
build (hw2, snes)	2m 39s
build (hw2, universal)	2m 36s
build (hw2, virtualboy)	2m 36s
build (hw2, wii_extension)	2m 38s
build (dbg, pad_test)	2m 37s
build (dbg, qemu)	2m 40s
build (dbg, qemu_bt_trace_replay)	2m 37s
build (dbg, qemu_bt_trace_replay_test)	2m 43s
	2h 7m 1s

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