Fix lint: remove unused var, apply De Morgan's law

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Frank Guo

cmd/rekal/cli/scrub/paths.go

@@ -48,10 +48,6 @@ func newAnonymizer(username string) *pathAnonymizer {
 	}
 }
 
-// projectRelativeDirs are directories under the home folder where we strip
-// the full path and keep only the project-relative portion.
-var projectRelativeDirs = []string{"Documents", "Downloads", "Desktop", "Projects", "projects", "src", "repos", "code", "dev", "workspace"}
-
 // AnonymizePath replaces the username in a single file path with the hashed form.
 func AnonymizePath(path string) string {
 	if defaultAnonymizer == nil {

cmd/rekal/cli/scrub/secrets.go

@@ -162,7 +162,7 @@ func isAllowedHighEntropy(s string) bool {
 
 func isHexString(s string) bool {
 	for _, c := range s {
-		if !((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F')) {
+		if (c < '0' || c > '9') && (c < 'a' || c > 'f') && (c < 'A' || c > 'F') {
 			return false
 		}
 	}