MicroPython: Remove NO_OVERCLOCK.

This flag disabled the accomodations for PIO clock speed, causing PIO to
be driven way, way too fast and the parallel LCD to go fuzzy and lose
colour.

micropython/modules/picosystem/micropython.cmake

@@ -32,7 +32,6 @@ target_include_directories(usermod_picosystem INTERFACE
 target_compile_definitions(usermod_picosystem INTERFACE
     MODULE_PICOSYSTEM_ENABLED=1
     PIXEL_DOUBLE=1
-    NO_OVERCLOCK=1
 )
 
 target_link_libraries(usermod_picosystem INTERFACE
@@ -53,12 +52,6 @@ set_source_files_properties(
     "-DPIXEL_DOUBLE=1"
 )
 
-set_source_files_properties(
-    ${CMAKE_CURRENT_LIST_DIR}/hardware.cpp
-    PROPERTIES COMPILE_FLAGS
-    "-DNO_OVERCLOCK=1"
-)
-
 # TODO fix sign compare issues in codebase
 set_source_files_properties(
     ${CMAKE_CURRENT_LIST_DIR}/../../../libraries/primitives.cpp