Remove inference.rst from clang tests

10 jobs for master in 357 minutes and 29 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #3698
amd64
job_clang_amd64

03:09:37

passed #3703
amd64
job_clang_amd64_nosh

02:47:51

passed #3704
amd64
job_clang_py2_amd64

02:47:24

passed #3697
amd64
job_gcc_amd64

03:03:33

passed #3705
amd64
job_gcc_amd64_nosh

02:12:10

failed #3706
amd64
job_gcc_py2_amd64

02:47:05

failed #3702
amd64
job_clang_amd64_nosh

failed #3700
amd64
job_clang_py2_amd64

failed #3701
amd64
job_gcc_amd64_nosh

failed #3699
amd64
job_gcc_py2_amd64

 
Name Stage Failure
failed
job_gcc_py2_amd64 Test

Doctest summary
===============
1052 tests
3 failures in tests
0 failures in setup code
0 failures in cleanup code
build finished with problems, 27 warnings.
ERROR: Job failed: exit status 1