* gnu/packages/engineering.scm (librecad): Update to 2.2.0.2. [arguments]<#:phases>: Delete the patch-boost-error, add-missing-headers and patch-paths phases. Remove trailing #t. * gnu/packages/patches/librecad-support-for-boost-1.76.patch: Remove file. * gnu/local.mk (dist_patch_DATA): Remove it. Change-Id: I23cc1a80b2e9e73bdef40575c4104480cc830d8c