remove interactive notes

Author: BillWagner

docs/csharp/how-to/modify-string-contents.md

@@ -9,8 +9,6 @@ helpviewer_keywords:
 
 This article demonstrates several techniques to produce a `string` by modifying an existing `string`. All the techniques demonstrated return the result of the modifications as a new `string` object. To demonstrate that the original and modified strings are distinct instances, the examples store the result in a new variable. You can examine the original `string` and the new, modified `string` when you run each example.
 
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 There are several techniques demonstrated in this article. You can replace existing text. You can search for patterns and replace matching text with other text. You can treat a string as a sequence of characters. You can also use convenience methods that remove white space. Choose the techniques that most closely match your scenario.
 
 ## Replace text

docs/fundamentals/runtime-libraries/system-datetime.md

@@ -27,8 +27,6 @@ Time values are measured in 100-nanosecond units called ticks. A particular date
 
 ## Quick links to example code
 
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 This article includes several examples that use the `DateTime` type:
 
 ### Initialization examples

docs/standard/base-types/standard-numeric-format-strings.md

@@ -67,8 +67,6 @@ The following table describes the standard numeric format specifiers and display
 
 ## Use standard numeric format strings
 
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 A standard numeric format string can be used to define the formatting of a numeric value in one of the following ways:
 
 - It can be passed to the `TryFormat` method or an overload of the `ToString` method that has a `format` parameter. The following example formats a numeric value as a currency string in the current culture (in this case, the en-US culture).