chore: remove severity case sensitive option

Author: ldez

.golangci.next.reference.yml

@@ -4209,10 +4209,6 @@ severity:
   # Default: ""
   default: error
 
-  # If set to true `severity-rules` regular expressions become case-sensitive.
-  # Default: false
-  case-sensitive: true
-
   # When a list of severity rules are provided, severity information will be added to lint issues.
   # Severity rules have the same filtering capability as exclude rules
   # except you are allowed to specify one matcher per severity rule.

jsonschema/golangci.next.jsonschema.json

@@ -4384,11 +4384,6 @@
           "type": "string",
           "default": ""
         },
-        "case-sensitive": {
-          "description": "If set to true, severity-rules regular expressions become case sensitive.",
-          "type": "boolean",
-          "default": false
-        },
         "rules": {
           "description": "When a list of severity rules are provided, severity information will be added to lint issues. Severity rules have the same filtering capability as exclude rules except you are allowed to specify one matcher per severity rule.\nOnly affects out formats that support setting severity information.",
           "type": "array",

pkg/config/severity.go

@@ -8,9 +8,8 @@ import (
 const severityRuleMinConditionsCount = 1
 
 type Severity struct {
-	Default       string         `mapstructure:"default"`
-	CaseSensitive bool           `mapstructure:"case-sensitive"`
-	Rules         []SeverityRule `mapstructure:"rules"`
+	Default string         `mapstructure:"default"`
+	Rules   []SeverityRule `mapstructure:"rules"`
 }
 
 func (s *Severity) Validate() error {

pkg/result/processors/base_rule.go

@@ -9,8 +9,6 @@ import (
 	"github.com/golangci/golangci-lint/pkg/result"
 )
 
-const caseInsensitivePrefix = "(?i)"
-
 type baseRule struct {
 	text       *regexp.Regexp
 	source     *regexp.Regexp

pkg/result/processors/severity.go

@@ -36,13 +36,7 @@ func NewSeverity(log logutils.Log, files *fsutils.Files, cfg *config.Severity) *
 		defaultSeverity: cfg.Default,
 	}
 
-	prefix := caseInsensitivePrefix
-	if cfg.CaseSensitive {
-		prefix = ""
-		p.name = "severity-rules-case-sensitive"
-	}
-
-	p.rules = parseRules(cfg.Rules, prefix, newSeverityRule)
+	p.rules = parseRules(cfg.Rules, "", newSeverityRule)
 
 	return p
 }

pkg/result/processors/severity_test.go

@@ -278,7 +278,6 @@ func TestSeverity_caseSensitive(t *testing.T) {
 				},
 			},
 		},
-		CaseSensitive: true,
 	}
 
 	p := NewSeverity(nil, files, opts)