This command effectively undoes the effects call glcreateshader

glDeleteShader
Name
glDeleteShader Deletes a shader object
C Specification
void glDeleteShader(GLuint shader)

Parameters

Errors
GL_INVALID_VALUE is generated if shader is not a value generated by OpenGL.

GL_INVALID_OPERATION is generated if glDeleteShader is executed between the execution of glBegin and the corresponding execution of glEnd.

shader	Specifies the program object from which to detach the shader object.

Errors
GL_INVALID_VALUE is generated if either program or shader is a value that was not generated by OpenGL.

GL_INVALID_OPERATION is generated if program is not a program object.