fix(flag): remove --clear-cache flag client mode (#2301)

docs/docs/references/cli/client.md

@@ -16,7 +16,6 @@ DEPRECATED OPTIONS:
    --severity value, -s value  severities of vulnerabilities to be displayed (comma separated) (default: "UNKNOWN,LOW,MEDIUM,HIGH,CRITICAL") [$TRIVY_SEVERITY]
    --output value, -o value    output file name [$TRIVY_OUTPUT]
    --exit-code value           Exit code when vulnerabilities were found (default: 0) [$TRIVY_EXIT_CODE]
-   --clear-cache, -c           clear image caches without scanning (default: false) [$TRIVY_CLEAR_CACHE]
    --ignore-unfixed            display only fixed vulnerabilities (default: false) [$TRIVY_IGNORE_UNFIXED]
    --removed-pkgs              detect vulnerabilities of removed packages (only for Alpine) (default: false) [$TRIVY_REMOVED_PKGS]
    --vuln-type value           comma-separated list of vulnerability types (os,library) (default: "os,library") [$TRIVY_VULN_TYPE]

pkg/commands/app.go

@@ -664,7 +664,6 @@ func NewClientCommand() *cli.Command {
 			&severityFlag,
 			&outputFlag,
 			&exitCodeFlag,
-			&clearCacheFlag,
 			&ignoreUnfixedFlag,
 			&removedPkgsFlag,
 			&vulnTypeFlag,