util/imagetools: remove unused Resolver.ImageConfig

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

vendor/github.com/containerd/ttrpc/.golangci.yml

@@ -1,52 +0,0 @@
-linters:
-  enable:
-    - staticcheck
-    - unconvert
-    - gofmt
-    - goimports
-    - revive
-    - ineffassign
-    - vet
-    - unused
-    - misspell
-  disable:
-    - errcheck
-
-linters-settings:
-  revive:
-    ignore-generated-headers: true
-    rules:
-      - name: blank-imports
-      - name: context-as-argument
-      - name: context-keys-type
-      - name: dot-imports
-      - name: error-return
-      - name: error-strings
-      - name: error-naming
-      - name: exported
-      - name: if-return
-      - name: increment-decrement
-      - name: var-naming
-        arguments: [["UID", "GID"], []]
-      - name: var-declaration
-      - name: package-comments
-      - name: range
-      - name: receiver-naming
-      - name: time-naming
-      - name: unexported-return
-      - name: indent-error-flow
-      - name: errorf
-      - name: empty-block
-      - name: superfluous-else
-      - name: unused-parameter
-      - name: unreachable-code
-      - name: redefines-builtin-id
-
-issues:
-  include:
-    - EXC0002
-
-run:
-  timeout: 8m
-  skip-dirs:
-    - example