Cleaning column without annotations.

[docmerlin]

When I don't have annotations I still have an extra empty first column.

What I see:

,result,table,_start,_stop,_time,_value,_measurement,ktest1,ktest2,_field,"ktest2,k-test3",_field,ktest3,_field
,_result,0,2019-04-25T04:35:25.0842584Z,2019-06-05T20:35:25.0842584Z,2019-06-05T20:34:55.058998001Z,5,tes0,k-test1,,ftest1,,,k-test3,
,_result,0,2019-04-25T04:35:25.0842584Z,2019-06-05T20:35:25.0842584Z,2019-06-05T20:34:55.058999Z,5,tes0,k-test1,,ftest1,,,k-test3,

What I expect to see:

result,table,_start,_stop,_time,_value,_measurement,ktest1,ktest2,_field,"ktest2,k-test3",_field,ktest3,_field
_result,0,2019-04-25T04:35:25.0842584Z,2019-06-05T20:35:25.0842584Z,2019-06-05T20:34:55.058998001Z,5,tes0,k-test1,,ftest1,,,k-test3,
_result,0,2019-04-25T04:35:25.0842584Z,2019-06-05T20:35:25.0842584Z,2019-06-05T20:34:55.058999Z,5,tes0,k-test1,,ftest1,,,k-test3,