Fix duplicate visitor.go.go

[cuminandpaprika]

Removes an accidentally introduced duplicate file

[codecov[bot]]

Codecov Report

Merging #1049 into master will decrease coverage by 1.23%. The diff coverage is 79.31%.

@@            Coverage Diff             @@
##           master    #1049      +/-   ##
==========================================
- Coverage   83.35%   82.12%   -1.24%     
==========================================
  Files          73       93      +20     
  Lines       10609     9800     -809     
==========================================
- Hits         8843     8048     -795     
+ Misses       1432     1399      -33     
- Partials      334      353      +19     

Impacted Files	Coverage Δ
cmd/sysl/cmd_env.go	60.00% <0.00%> (ø)
cmd/sysl/cmd_runner.go	95.58% <ø> (ø)
pkg/database/db_test_utils.go	80.00% <0.00%> (-3.34%)	:arrow_down:
pkg/diagrams/plantuml.go	0.00% <0.00%> (ø)
cmd/sysl/cmd_export.go	50.00% <41.66%> (ø)
cmd/sysl/cmd_diagram.go	43.24% <50.00%> (ø)
cmd/sysl/sysl.go	72.09% <50.00%> (ø)
pkg/importer/spanner.go	53.33% <53.33%> (ø)
pkg/cmdutils/visitor.go	80.86% <62.96%> (-3.41%)	:arrow_down:
pkg/importer/importer.go	70.83% <70.83%> (ø)
... and 107 more