Remove partial implementation status from async clipboard

This status for read() and readText() isn't clearly explained by the
notes, but seems to have been carried forward when merging compat
statements in mdn#21667.

Since the required formats are now supported, it doesn't make sense to
continue to claim partial implementation.

mdn#7991 would make this
clearer still.

api/Clipboard.json

@@ -46,7 +46,6 @@
           "support": {
             "chrome": {
               "version_added": "66",
-              "partial_implementation": true,
               "notes": [
                 "From version 86, the <code>text/html</code> MIME type is supported.",
                 "From version 85, Requires Permission-Policy <code>clipboard-read</code> permission.",
@@ -57,7 +56,6 @@
             },
             "chrome_android": {
               "version_added": "66",
-              "partial_implementation": true,
               "notes": [
                 "From version 86, the <code>text/html</code> MIME type is supported.",
                 "From version 85, Requires Permission-Policy <code>clipboard-read</code> permission.",
@@ -98,7 +96,6 @@
             },
             "webview_android": {
               "version_added": "66",
-              "partial_implementation": true,
               "notes": [
                 "From version 84, the <code>image/png</code> MIME type is supported.",
                 "From version 66, the <code>text/plain</code> MIME type is supported.",
@@ -158,7 +155,6 @@
           "support": {
             "chrome": {
               "version_added": "66",
-              "partial_implementation": true,
               "notes": [
                 "From version 85, Requires Permission-Policy <code>clipboard-read</code> permission.",
                 "Requires Permission API <code>clipboard-read</code> permission. Does not require transient activation."