Delete unnecessary C++/CLI snippets

[gewarren]

(Hide whitespace changes.)

This PR deletes C++/CLI snippets that demonstrate API usage that aren't exclusively used in a .NET Framework or .NET interop context.

Contributes to #45892.

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📄 File	🔗 Preview link
docs/standard/assembly/find-fully-qualified-name.md	How to: Find an assembly's fully qualified name
docs/standard/attributes/retrieving-information-stored-in-attributes.md	Retrieving Information Stored in Attributes
docs/standard/attributes/writing-custom-attributes.md	Write custom attributes
docs/standard/base-types/padding.md	"Padding Strings in .NET"
docs/standard/base-types/parsing-other.md	Parse other strings in .NET
docs/standard/base-types/standard-numeric-format-strings.md	Standard numeric format strings
docs/standard/base-types/stringbuilder.md	docs/standard/base-types/stringbuilder
docs/standard/base-types/trimming.md	Trim and remove characters from strings in .NET
docs/standard/data/xml/building-xml-schemas.md	"Building XML Schemas"
docs/standard/data/xml/including-or-importing-xml-schemas.md	Include or import XML schemas
docs/standard/data/xml/inferring-schemas-from-xml-documents.md	docs/standard/data/xml/inferring-schemas-from-xml-documents
docs/standard/data/xml/insert-xml-data-using-xpathnavigator.md	Insert XML data using XPathNavigator
docs/standard/data/xml/modify-xml-data-using-xpathnavigator.md	"Modify XML Data using XPathNavigator"
docs/standard/data/xml/post-schema-compilation-infoset.md	Post-schema compilation infoset
docs/standard/data/xml/reading-and-writing-xml-schemas.md	Read and write XML schemas
docs/standard/data/xml/xml-schema-xsd-validation-with-xmlschemaset.md	docs/standard/data/xml/xml-schema-xsd-validation-with-xmlschemaset
docs/standard/events/how-to-handle-multiple-events-using-event-properties.md	How to: Handle Multiple Events Using Event Properties
docs/standard/garbage-collection/notifications.md	"Garbage Collection Notifications"
docs/standard/io/how-to-delete-files-and-directories-in-isolated-storage.md	How to: Delete Files and Directories in Isolated Storage
docs/standard/io/how-to-delete-stores-in-isolated-storage.md	docs/standard/io/how-to-delete-stores-in-isolated-storage
docs/standard/io/how-to-find-existing-files-and-directories-in-isolated-storage.md	How to: Find existing files and directories in isolated storage
docs/standard/io/how-to-obtain-stores-for-isolated-storage.md	"How to: Obtain Stores for Isolated Storage"
docs/standard/io/how-to-read-and-write-to-a-newly-created-data-file.md	How to: Read and write to a newly created data file
docs/standard/io/how-to-read-characters-from-a-string.md	How to: Read characters from a string
docs/standard/io/how-to-use-anonymous-pipes-for-local-interprocess-communication.md	docs/standard/io/how-to-use-anonymous-pipes-for-local-interprocess-communication
docs/standard/io/how-to-use-named-pipes-for-network-interprocess-communication.md	How to: Use named pipes for network interprocess communication
docs/standard/io/types-of-isolation.md	"Types of Isolation"
docs/standard/native-interop/qualify-net-types-for-interoperation.md	Qualify .NET types for COM interoperation
docs/standard/security/how-to-access-hardware-encryption-devices.md	docs/standard/security/how-to-access-hardware-encryption-devices
docs/standard/threading/creating-threads-and-passing-data-at-start-time.md	Create threads and pass data at start time

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This table shows preview links for the 30 files with the most changes. For preview links for other files in this PR, select OpenPublishing.Build Details within checks.

[BillWagner]

This LGTM @gewarren

Love the simplification for this.

Let's now.

[gewarren]

Thanks for supporting this @BillWagner