schema/test/config/good/minimal: Drop 'process'

It's optional since c41ea83d (config: Make process optional,
2017-02-27, #701) which landed yesterday.

Mrunal wanted to continue testing a config which has enough for a
'start' invocation [1], so I've kept the old JSON as
minimal-for-start.json (washing it through 'make -C schema fmt' to
adjust the args indenting).

[1]: https://github.com/opencontainers/runtime-spec/pull/805#issuecomment-300811461

Signed-off-by: W. Trevor King <wking@tremily.us>

schema/test/config/good/minimal-for-start.json

@@ -0,0 +1,20 @@
+{
+    "ociVersion": "1.0.0",
+    "platform": {
+        "os": "linux",
+        "arch": "amd64"
+    },
+    "root": {
+        "path": "rootfs"
+    },
+    "process": {
+        "cwd": "/",
+        "args": [
+            "sh"
+        ],
+        "user": {
+            "uid": 0,
+            "gid": 0
+        }
+    }
+}

schema/test/config/good/minimal.json

@@ -6,13 +6,5 @@
     },
     "root": {
         "path": "rootfs"
-    },
-    "process": {
-        "cwd": "/",
-        "args": ["sh"],
-        "user": {
-            "uid": 0,
-            "gid": 0
-        }
     }
 }