esp8266/Makefile: Remove commented-out unused lines.

These were copied from the stm32 port (then stmhal) at the very beginning
of this port, with the anticipation that the esp8266 port would have board
definition files with a list of valid pins and their names.  But that has
not been implemented and likely won't be, so remove the corresponding lines
from the Makefile.

ports/esp8266/Makefile

@@ -143,7 +143,6 @@ OBJ += $(addprefix $(BUILD)/, $(SRC_S:.s=.o))
 OBJ += $(addprefix $(BUILD)/, $(EXTMOD_SRC_C:.c=.o))
 OBJ += $(addprefix $(BUILD)/, $(LIB_SRC_C:.c=.o))
 OBJ += $(addprefix $(BUILD)/, $(DRIVERS_SRC_C:.c=.o))
-#OBJ += $(BUILD)/pins_$(BOARD).o
 
 # List of sources for qstr extraction
 SRC_QSTR += $(SRC_C) $(EXTMOD_SRC_C) $(LIB_SRC_C) $(DRIVERS_SRC_C)
@@ -195,32 +194,6 @@ ota:
 	rm -f $(BUILD)/firmware.elf $(BUILD)/firmware.elf*.bin
 	$(MAKE) LDSCRIPT=esp8266_ota.ld FWBIN=$(BUILD)/firmware-ota.bin
 
-#MAKE_PINS = boards/make-pins.py
-#BOARD_PINS = boards/$(BOARD)/pins.csv
-#AF_FILE = boards/stm32f4xx_af.csv
-#PREFIX_FILE = boards/stm32f4xx_prefix.c
-#GEN_PINS_SRC = $(BUILD)/pins_$(BOARD).c
-#GEN_PINS_HDR = $(HEADER_BUILD)/pins.h
-#GEN_PINS_QSTR = $(BUILD)/pins_qstr.h
-#GEN_PINS_AF_CONST = $(HEADER_BUILD)/pins_af_const.h
-#GEN_PINS_AF_PY = $(BUILD)/pins_af.py
-
-# Making OBJ use an order-only depenedency on the generated pins.h file
-# has the side effect of making the pins.h file before we actually compile
-# any of the objects. The normal dependency generation will deal with the
-# case when pins.h is modified. But when it doesn't exist, we don't know
-# which source files might need it.
-#$(OBJ): | $(HEADER_BUILD)/pins.h
-
-# Use a pattern rule here so that make will only call make-pins.py once to make
-# both pins_$(BOARD).c and pins.h
-#$(BUILD)/%_$(BOARD).c $(HEADER_BUILD)/%.h $(HEADER_BUILD)/%_af_const.h $(BUILD)/%_qstr.h: boards/$(BOARD)/%.csv $(MAKE_PINS) $(AF_FILE) $(PREFIX_FILE) | $(HEADER_BUILD)
-#	$(ECHO) "Create $@"
-#	$(Q)$(PYTHON) $(MAKE_PINS) --board $(BOARD_PINS) --af $(AF_FILE) --prefix $(PREFIX_FILE) --hdr $(GEN_PINS_HDR) --qstr $(GEN_PINS_QSTR) --af-const $(GEN_PINS_AF_CONST) --af-py $(GEN_PINS_AF_PY) > $(GEN_PINS_SRC)
-#
-#$(BUILD)/pins_$(BOARD).o: $(BUILD)/pins_$(BOARD).c
-#	$(call compile_c)
-
 include $(TOP)/py/mkrules.mk
 
 axtls: $(BUILD)/libaxtls.a