Remove GSNv1 contracts (#2521)

Co-authored-by: Francisco Giordano <frangio.1@gmail.com>
OpenZeppelin · Feb 18, 2021 · f7c8252 · f7c8252
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -7,6 +7,7 @@
  * `ERC20`: Removed the `_setDecimals` function and the storage slot associated to decimals. ([#2502](https://github.com/OpenZeppelin/openzeppelin-contracts/pull/2502))
  * `Strings`: addition of a `toHexString` function.  ([#2504](https://github.com/OpenZeppelin/openzeppelin-contracts/pull/2504))
  * `EnumerableMap`: change implementation to optimize for `key → value` lookups instead of enumeration. ([#2518](https://github.com/OpenZeppelin/openzeppelin-contracts/pull/2518))
+ * `GSN`: Deprecate GSNv1 support in favor of upcomming support for GSNv2. ([#2521](https://github.com/OpenZeppelin/openzeppelin-contracts/pull/2521))
 
 ## 3.4.0 (2021-02-02)
 

diff --git a/contracts/GSN/Context.sol b/contracts/GSN/Context.sol
diff --git a/contracts/GSN/GSNRecipient.sol b/contracts/GSN/GSNRecipient.sol
diff --git a/contracts/GSN/GSNRecipientERC20Fee.sol b/contracts/GSN/GSNRecipientERC20Fee.sol