dev-python/matplotlib has a qt4 USE flag to enable Qt4 support - since Qt4 is dead, please remove the qt4 USE flag and only provide the qt5 option.
[master 1dde5710999] dev-python/matplotlib: Version bump (#635882), disable qt4 support (#634952), fix build failure with docs (#636176 by Serge Gavrilov). 2 files changed, 251 insertions(+) create mode 100644 dev-python/matplotlib/matplotlib-2.1.0.ebuild
Not fixed until <2.1.0-r1 was cleaned up. Can we clean up now?
Cleanup done in fe830575e425a875093a98fc75702338dba6b35a.