fix: address review issues from MICRO_PIP migration

- piconditionvar.h: remove phantom wait(lk, timeout) stubs not in real class
- pithread.h: remove duplicate #ifndef PIP_NO_THREADS guard
- piscreendrawer/tile/tiles.cpp: remove duplicate #if !defined(PICO_SDK)
- cmake/FindPIP.cmake: replace PIP_MICRO with PIP_EMBEDDED

libs/console/piscreentiles.cpp

@@ -23,8 +23,6 @@
 
 #if !defined(PICO_SDK)
 
-#if !defined(PICO_SDK)
-
 
 using namespace PIScreenTypes;
 
@@ -698,5 +696,3 @@ void TileInput::reserCursor() {
 }
 
 #endif // !PICO_SDK
-
-#endif // !PICO_SDK