Proposal to remove deprecated identity service endpoints

proposals/0000-remove-deprecated-identity-endpoints.md

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+# MSC0000: Remove deprecated Identity Service endpoints
+
+Implementations will have had plenty of time to adopt the new v2 API for Identity Servers, so
+we should clean out the old endpoints.
+
+All deprecated endpoints in the r0.3.0 Identity Service API specification are to be removed.
+
+For completeness, this includes:
+
+* `GET /_matrix/identity/api/v1`
+* `GET /_matrix/identity/api/v1/pubkey/{keyId}`
+* `GET /_matrix/identity/api/v1/pubkey/isvalid`
+* `GET /_matrix/identity/api/v1/pubkey/ephemeral/isvalid`
+* `GET /_matrix/identity/api/v1/lookup`
+* `POST /_matrix/identity/api/v1/bulk_lookup`
+* `POST /_matrix/identity/api/v1/validate/email/requestToken`
+* `POST /_matrix/identity/api/v1/validate/email/submitToken`
+* `GET /_matrix/identity/api/v1/validate/email/submitToken`
+* `POST /_matrix/identity/api/v1/validate/msisdn/requestToken`
+* `POST /_matrix/identity/api/v1/validate/msisdn/submitToken`
+* `GET /_matrix/identity/api/v1/validate/msisdn/submitToken`
+* `GET /_matrix/identity/api/v1/3pid/getValidated3pid`
+* `POST /_matrix/identity/api/v1/3pid/bind`
+* `POST /_matrix/identity/api/v1/3pid/unbind`
+* `POST /_matrix/identity/api/v1/store-invite`
+* `POST /_matrix/identity/api/v1/sign-ed25519`