[NNVM][TENSORFLOW] Cleanup redundant code.#1551

Merged

tqchen merged 2 commits intoapache:masterfrom srkreddy1238:tf

Aug 4, 2018

+83-157

Commits on Aug 3, 2018

[NNVM][TENSORFLOW] Some cleanup by combining depthwise with convolution.
srkreddy1238
committed

Commits on Aug 4, 2018

[NNVM][TENSORFLOW] Cleanup Const, Placeholder, _input_shapes.
srkreddy1238
committed