chore: remove ESP32-C3 target support and CI coverage

variants/tenstar_c3/target.h

@@ -3,7 +3,7 @@
 #define RADIOLIB_STATIC_ONLY 1
 #include <RadioLib.h>
 #include <helpers/radiolib/RadioLibWrappers.h>
-#include <helpers/XiaoC3Board.h>
+#include <XiaoC3Board.h>
 #include <helpers/radiolib/CustomSX1262Wrapper.h>
 #include <helpers/radiolib/CustomSX1268Wrapper.h>
 #include <helpers/AutoDiscoverRTCClock.h>
@@ -19,4 +19,3 @@ uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
 void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
-