brew doctor output for issue

brew doctor output

$ brew doctor
Warning: Setting DYLD_* vars can break dynamic linking.
Set variables:
    DYLD_LIBRARY_PATH

Warning: /usr/local/share/python is not needed in PATH.
Formerly homebrew put Python scripts you installed via `pip` or `pip3`
(or `easy_install`) into that directory above but now it can be removed
from your PATH variable.
Python scripts will now install into /usr/local/bin.
You can delete anything, except 'Extras', from the /usr/local/share/python
(and /usr/local/share/python3) dir and install affected Python packages
anew with `pip install --upgrade`.

Warning: Unbrewed dylibs were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected dylibs:
    /usr/local/lib/libfreetype.6.dylib
    /usr/local/lib/libjpeg.8.dylib
    /usr/local/lib/libpcre.1.dylib
    /usr/local/lib/libpcrecpp.0.dylib
    /usr/local/lib/libpcreposix.0.dylib
    /usr/local/lib/libpng15.15.dylib

Warning: Unbrewed .la files were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected .la files:
    /usr/local/lib/libfreetype.la
    /usr/local/lib/libjpeg.la
    /usr/local/lib/libpcre.la
    /usr/local/lib/libpcrecpp.la
    /usr/local/lib/libpcreposix.la
    /usr/local/lib/libpng15.la

Warning: Unbrewed .pc files were found in /usr/local/lib/pkgconfig.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected .pc files:
    /usr/local/lib/pkgconfig/freetype2.pc
    /usr/local/lib/pkgconfig/fuse.pc
    /usr/local/lib/pkgconfig/libpcre.pc
    /usr/local/lib/pkgconfig/libpcrecpp.pc
    /usr/local/lib/pkgconfig/libpcreposix.pc
    /usr/local/lib/pkgconfig/libpng15.pc

Warning: Unbrewed static libraries were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected static libraries:
    /usr/local/lib/libfreetype.a
    /usr/local/lib/libjpeg.a
    /usr/local/lib/libpcre.a
    /usr/local/lib/libpcrecpp.a
    /usr/local/lib/libpcreposix.a
    /usr/local/lib/libpng15.a

Warning: You have unlinked kegs in your Cellar
Leaving kegs unlinked can lead to build-trouble and cause brews that depend on
those kegs to fail to run properly once built. Run `brew link` on these:

    jpeg
    mercurial

$ echo $DYLD_LIBRARY_PATH
/usr/local/mysql/lib: