Remove check for tags + duration in query parser

[bobrik]

The check only applies to Cassandra backend, which already has the same check enabled.

Resolves #1047.

Signed-off-by: Ivan Babrou ibobrik@gmail.com

[bobrik]

Some builds need a restart:

# cd .; git clone https://go.googlesource.com/tools /home/travis/gopath/src/golang.org/x/tools
Cloning into '/home/travis/gopath/src/golang.org/x/tools'...
error: RPC failed; HTTP 502 curl 22 The requested URL returned error: 502 Bad Gateway
fatal: The remote end hung up unexpectedly
package golang.org/x/tools/cover: exit status 128
make: *** [install-tools] Error 1

[yurishkuro]

Unit test is failing

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@cb226ff). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #1477   +/-   ##
=========================================
  Coverage          ?   99.83%           
=========================================
  Files             ?      179           
  Lines             ?     8557           
  Branches          ?        0           
=========================================
  Hits              ?     8543           
  Misses            ?        7           
  Partials          ?        7

Impacted Files	Coverage Δ
cmd/query/app/query_parser.go	100% <ø> (ø)

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[bobrik]

@yurishkuro all green now.

[yurishkuro]

Thanks!