remove potentially confusing build instructions

17 jobs for master in 7 minutes and 50 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build
passed #46343
Linux
build-2.7-linux

00:01:47

passed #46344
Apple
build-2.7-macos

00:02:28

passed #46341
Linux
build-3.5-linux

00:01:01

passed #46342
Apple
build-3.5-macos

00:02:29

passed #46340
VS2017
build-3.6-VS2017

00:01:32

 
  Test
passed #46348
Linux
test-2.7-linux

00:00:09

passed #46349
Apple
test-2.7-macos

00:00:11

passed #46346
Linux
test-3.5-linux

00:00:05

passed #46347
Apple
test-3.5-macos

00:00:13

passed #46345
VS2017
test-3.6-VS2017

00:00:29

 
  Deploy
passed #46353
Linux
deploy-2.7-linux

00:00:01

passed #46354
Apple
deploy-2.7-macos

00:00:01

passed #46351
Linux
deploy-3.5-linux

00:00:01

passed #46352
Apple
deploy-3.5-macos

00:00:01

passed #46350
VS2017
deploy-3.6-VS2017

00:00:08

passed #46356
Linux
deploy-documentation

00:00:10

passed #46355
Linux
deploy-sdist

00:00:12