Remove changesets already included in CHANGELOG (#4805)

.changeset/dull-ghosts-sip.md

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-'openzeppelin-solidity': patch
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-
-`AccessManager`, `AccessManaged`, `GovernorTimelockAccess`: Ensure that calldata shorter than 4 bytes is not padded to 4 bytes.
-pr: #4624

.changeset/grumpy-poets-rush.md

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-'openzeppelin-solidity': major
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-
-Upgradeable Contracts: No longer transpile interfaces, libraries, and stateless contracts.

.changeset/purple-squids-attend.md

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-'openzeppelin-solidity': patch
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-
-`AccessManager`: Use named return parameters in functions that return multiple values.
-pr: #4624

.changeset/rude-weeks-beg.md

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-'openzeppelin-solidity': patch
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-
-`ERC2771Context` and `Context`: Introduce a `_contextPrefixLength()` getter, used to trim extra information appended to `msg.data`.

.changeset/strong-points-invent.md

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-'openzeppelin-solidity': patch
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-
-`Multicall`: Make aware of non-canonical context (i.e. `msg.sender` is not `_msgSender()`), allowing compatibility with `ERC2771Context`.

.changeset/thirty-drinks-happen.md

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-'openzeppelin-solidity': major
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-
-`AccessManager`: Make `schedule` and `execute` more conservative when delay is 0.