[turbofan] Remove --turbo-asm-deoptimization flag.

src/flag-definitions.h

Index: src/flag-definitions.h
diff --git a/src/flag-definitions.h b/src/flag-definitions.h
index a85c9733be7ebfedb4e0f2f05e1914c2ad9d80dc..54cb936a330749ef77b8e57d77a0258b258c66fd 100644
--- a/src/flag-definitions.h
+++ b/src/flag-definitions.h
@@ -419,7 +419,6 @@ DEFINE_BOOL(omit_map_checks_for_leaf_maps, true,
 
 // Flags for TurboFan.
 DEFINE_BOOL(turbo, false, "enable TurboFan compiler")
-DEFINE_IMPLICATION(turbo, turbo_asm_deoptimization)
 DEFINE_BOOL(turbo_sp_frame_access, false,
             "use stack pointer-relative access to frame wherever possible")
 DEFINE_BOOL(turbo_preprocess_ranges, true,
@@ -439,8 +438,6 @@ DEFINE_BOOL(trace_turbo_jt, false, "trace TurboFan's jump threading")
 DEFINE_BOOL(trace_turbo_ceq, false, "trace TurboFan's control equivalence")
 DEFINE_BOOL(trace_turbo_loop, false, "trace TurboFan's loop optimizations")
 DEFINE_BOOL(turbo_asm, true, "enable TurboFan for asm.js code")
-DEFINE_BOOL(turbo_asm_deoptimization, false,
-            "enable deoptimization in TurboFan for asm.js code")
 DEFINE_BOOL(turbo_verify, DEBUG_BOOL, "verify TurboFan graphs at each phase")
 DEFINE_STRING(turbo_verify_machine_graph, nullptr,
               "verify TurboFan machine graph before instruction selection")