diff --git a/_bookdown_files/02-chapter_of_course_files/figure-html/unnamed-chunk-2-1.png b/_bookdown_files/02-chapter_of_course_files/figure-html/unnamed-chunk-2-1.png
deleted file mode 100644
index 0a0abd2..0000000
Binary files a/_bookdown_files/02-chapter_of_course_files/figure-html/unnamed-chunk-2-1.png and /dev/null differ
diff --git a/_bookdown_files/02-chapter_of_course_files/figure-html/unnamed-chunk-3-1.png b/_bookdown_files/02-chapter_of_course_files/figure-html/unnamed-chunk-3-1.png
deleted file mode 100644
index 0f0641a..0000000
Binary files a/_bookdown_files/02-chapter_of_course_files/figure-html/unnamed-chunk-3-1.png and /dev/null differ