Remove usage of all private poppler headers in pdf-tools

This commit also removes C++ entirely, as it is not needed anymore for
correct compilation of `epdfinfo`. The following changes are made:

- Remove private headers from all the server code. This involves:
  - Replace private header functionality with the correct public
    functions provided by poppler.
  - Remove unneeded headers around date checks
  - Delete dead-code (headers, m4 macros)

- Remove C++, g++ and similar aliases from all the code. Also:
  - Remove related information from the README
  - Remove related information from CI and Dockerfiles

Work done by: @Pi-Cla
Closes: #105, #103, #109, #114

1 files changed, 0 insertions, 7 deletions

diff --git a/server/install_test.cpp b/server/install_test.cpp
deleted file mode 100644
index d553d2b..0000000
--- a/server/install_test.cpp
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <PDFDocEncoding.h>
-#include <iostream>
-
-int main() {
-        std::cout << "Hello World, pdf-tools!";
-        return 0;
-}