Revert "added missing variable"

This reverts commit 7e36237f19d2b021cd7c923d1be3a9061919621f.
Revert "Fully expand eng/debug/tests module install files"

This reverts commit 0267a44f8237e6cfa029911289aff62c7b8fa8d2.
Revert "build: Include an extra device.mk"

This reverts commit 203e6462b75f0a938a32195d153f6959e0e06b38.
Revert "build: qcom: Set QCOM_*_PATH variables for hardware/qcom-* projects"

This reverts commit a459592a99c9121e0865b487901f4cdcf59c3afa.