Lift travis-specific bits out of Makefile

.travis.yml

@@ -5,4 +5,4 @@ os:
 install:
   - git clone --depth 1 --recurse-submodules https://github.com/keyboardio/Arduino-Boards hardware/keyboardio/avr
 script:
-  - make travis-test
+  - make travis-test BOARD_HARDWARE_PATH=$(pwd)/hardware

Makefile

@@ -4,10 +4,6 @@
 MAKEFILE_PREFIX=keyboardio/avr/libraries/Kaleidoscope-Plugin/build
 UNAME_S := $(shell uname -s)
 
-ifneq ($(wildcard $(shell pwd)/hardware/$(MAKEFILE_PREFIX)), "" )
- BOARD_HARDWARE_PATH=$(shell pwd)/hardware
-endif
-
 BOARD_HARDWARE_PATH ?= $(HOME)/Arduino/hardware
 ifeq ($(UNAME_S),Darwin)
 BOARD_HARDWARE_PATH ?= $(HOME)/Library/Arduino/hardware