removed wrong suffix (.PNG)

diff --git a/doc/example_01.PNG b/doc/example_01.PNG
deleted file mode 100644 (file)
index d383e60..0000000
Binary files a/doc/example_01.PNG and /dev/null differ

diff --git a/doc/example_02.PNG b/doc/example_02.PNG
deleted file mode 100644 (file)
index dfb2e0c..0000000
Binary files a/doc/example_02.PNG and /dev/null differ

diff --git a/doc/example_03.PNG b/doc/example_03.PNG
deleted file mode 100644 (file)
index 57943f5..0000000
Binary files a/doc/example_03.PNG and /dev/null differ

diff --git a/doc/example_04.PNG b/doc/example_04.PNG
deleted file mode 100644 (file)
index b4a55ed..0000000
Binary files a/doc/example_04.PNG and /dev/null differ