interpreter: Simplify memory.grow a bit (#2899)

core/iwasm/interpreter/wasm_interp_classic.c

@@ -2149,11 +2149,7 @@ wasm_interp_call_func_bytecode(WASMModuleInstance *module,
 #if !defined(OS_ENABLE_HW_BOUND_CHECK)              \
     || WASM_CPU_SUPPORTS_UNALIGNED_ADDR_ACCESS == 0 \
     || WASM_ENABLE_BULK_MEMORY != 0
-#if WASM_ENABLE_THREAD_MGR == 0
-                    linear_mem_size = memory->memory_data_size;
-#else
                     linear_mem_size = GET_LINEAR_MEMORY_SIZE(memory);
-#endif
 #endif
                 }
 

core/iwasm/interpreter/wasm_interp_fast.c

@@ -1917,11 +1917,7 @@ wasm_interp_call_func_bytecode(WASMModuleInstance *module,
 #if !defined(OS_ENABLE_HW_BOUND_CHECK)              \
     || WASM_CPU_SUPPORTS_UNALIGNED_ADDR_ACCESS == 0 \
     || WASM_ENABLE_BULK_MEMORY != 0
-#if WASM_ENABLE_THREAD_MGR == 0
-                    linear_mem_size = memory->memory_data_size;
-#else
                     linear_mem_size = GET_LINEAR_MEMORY_SIZE(memory);
-#endif
 #endif
                 }