Update README.md

Author: daisukenishino2

README.md

@@ -9,22 +9,11 @@ The programs in this repository are developed in the following IDE/targetFramewo
 - IDE (Integrated Development Environment)  
   Visual Studio 2022
 - targetFramework (Run-time environment)
-  - .NET Framework 4.5.2 (net452)
-  - .NET Framework 4.6 (net46)
-  - .NET Framework 4.7 (net47)
   - .NET Framework 4.8 (net48)
-  - .NET Standard 2.0 (netstandard2.0)
-  - .NET Standard 2.1 (netstandard2.1)
-  - .NET Core 2.0 (netcoreapp2.0)
-  - .NET Core 3.0 (netcoreapp3.0)
-  - .NET 5.0 (net5.0)
-  - .NET 6.0 (net6.0)
+  - .NET 8.0 (net8.0)
 
 The name of projects and solutions include the targetFramework.
-For example, the projects and solutions for net47(.NET Framework 4.7) are named {identifier}_net47.{ext}.
-
-The programs in this repository are for *open source developers*.
-The users who use Open Touryo in a system development project need to use [OpenTouryoTemplates repository](https://github.com/OpenTouryoProject/OpenTouryoTemplates).
+For example, the projects and solutions for net48(.NET Framework 4.8) are named {identifier}_net48.{ext}.
 
 ## Summary
 Please refer to the following files.
@@ -44,13 +33,3 @@ License files are stored in this directory.
 
 #### [/root/](https://github.com/OpenTouryoProject/OpenTouryo/tree/master/root)
 Programs, configuration files, sql files, and more are stored in this directory.
-
-## Templates base
-*Open Touryo Template Base* is the *foundation* of the development infrastructure (project template) of the programs using Open Touryo.
-The samples included in *Open Touryo Template Base* can be used to evaluate Open Touryo. 
-
-When the mismatch is generated between *the features of Open Touryo* and *the requirements of the development project*, the customizing template base is useful for resolving the mismatch.  
-Refer to the [tutorial document](https://github.com/OpenTouryoProject/OpenTouryo/wiki) about the customizing method of template base.
-
-For more information, please refer to the Readme files in the following repository.
- - [OpenTouryoTemplates](https://github.com/OpenTouryoProject/OpenTouryoTemplates)