remove unused variables

They're unused since 4b85baa9a11b4a51f92a2bc042d177f79b269b92
el-get-init-and-install: handle new :depends

If a package to be init'd has new dependencies, simply install them
rather than throwing an error about missing packages. A warning about
changing non-whitelisted properties is still issued.
Merge pull request #1594 from npostavs/new-dep

Handle change in :depends
`f' depends on `s' and `dash'
Merge pull request #1595 from zonuexe/add_f_dependency

`f' depends on `s' and `dash'
el-get-set-info-path: make safe if package removed

Use an eval-after-load form that won't throw an error, regardless of
removed packages.
don't use called-interactively-p

Replace it with always t interactive spec, as suggested by its
docstring.
Merge pull request #1597 from npostavs/no-interactive-p

don't use called-interactively-p
Merge pull request #1596 from npostavs/safe-set-info-path

el-get-set-info-path: make safe if package removed